LP38691QSD-ADJ datasheet(5/27 Pages) TI1

Part #	LP38691QSD-ADJ

Description	500-mA Low-Dropout CMOS Linear Regulators Stable

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Manufacturer	TI1 [Texas Instruments]

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LP38691-ADJ, LP38693-ADJ, LP38691-ADJ-Q1, LP38693-ADJ-Q1

www.ti.com

SNVS324K – JANUARY 2005 – REVISED JANUARY 2016

Product Folder Links: LP38691-ADJ LP38693-ADJ LP38691-ADJ-Q1 LP38693-ADJ-Q1

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(1)

Typical numbers represent the most likely parametric norm for 25°C operation.

(2)

Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.

(3)

Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from 1 mA to

full load.

(4)

Dropout voltage is defined as the minimum input to output differential required to maintain the output within 100 mV of nominal value.

6.6 Electrical Characteristics

Unless otherwise specified, limits apply for TJ = 25°C, VIN = VOUT + 1 V, CIN = COUT = 10 µF, ILOAD = 10 mA. Minimum and

maximum limits are specified through testing, statistical correlation, or design.

PARAMETER

TEST CONDITIONS

MIN

TYP(1)

MAX

UNIT

VADJ

ADJ pin voltage

VIN = 2.7 V

1.225

1.25

1.275

V

3.2 V

≤ VIN ≤ 10 V, 100 µA < IL < 0.5 A

1.25

3.2 V

≤ VIN ≤ 10 V, 100 µA < IL < 0.5 A

Full operating temperature range

1.2

1.3

ΔVOUT/ΔVIN

Output voltage line

regulation(2)

VOUT + 0.5 V ≤ VIN ≤ 10 V

IL = 25 mA

0.03

%/V

VOUT + 0.5 V ≤ VIN ≤ 10 V

IL = 25 mA

Full operating temperature range

0.1

ΔVOUT/ΔIL

Output voltage load

regulation(3)

1 mA < IL < 0.5 A

VIN = VOUT + 1 V

1.8

%/A

1 mA < IL < 0.5 A

VIN = VOUT + 1 V

Full operating temperature range

5

VDO

Dropout voltage(4)

(VOUT = 2.5 V)

IL = 0.1 A

80

mV

IL = 0.5 A

430

(VOUT = 2.5 V)

Full operating temperature

range

IL = 0.1 A

145

IL = 0.5 A

725

(VOUT = 3.3 V)

IL = 0.1 A

65

IL = 0.5 A

330

(VOUT = 3.3 V)

Full operating temperature

range

IL = 0.1 A

110

IL = 0.5 A

550

(VOUT = 5 V)

IL = 0.1 A

45

IL = 0.5 A

250

(VOUT = 5 V)

Full operating temperature

range

IL = 0.1 A

100

IL = 0.5 A

450

IQ

Quiescent current

VIN ≤ 10 V, IL =100 µA – 0.5 A

55

µA

VIN ≤ 10 V, IL =100 µA – 0.5 A

Full operating temperature range

100

VEN ≤ 0.4 V, (LP38693 Only)

0.001

1

IL(MIN)

Minimum load current

VIN – VOUT ≤ 4 V

Full operating temperature range

100

IFB

Foldback current limit

VIN – VOUT > 5 V

350

mA

VIN – VOUT < 4 V

850

PSRR

Ripple rejection

VIN = VOUT + 2 V(DC), with 1 V(p-p) /

120-Hz Ripple

55

dB

TSD

Thermal shutdown activation

(junction temp)

160

°C

TSD (HYST)

Thermal shutdown hysteresis

(junction temp)

10

IADJ

ADJ input leakage current

VADJ = 0 V to 1.5 V, VIN = 10 V

–100

0.01

100

nA

en

Output noise

BW = 10 Hz to 10 kHz

VOUT = 3.3 V

0.7

µV/

√Hz

VOUT (LEAK)

Output leakage current

VOUT = VOUT(NOM) + 1 V at 10 VIN

0.5

2

µA

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